/*

 * Licensed to the Apache Software Foundation (ASF) under one

 * or more contributor license agreements.  See the NOTICE file

 * distributed with this work for additional information

 * regarding copyright ownership.  The ASF licenses this file

 * to you under the Apache License, Version 2.0 (the

 * "License"); you may not use this file except in compliance

 * with the License.  You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

package com.bff.gaia.unified.sdk.extensions.euphoria.core.util;



import java.io.IOException;

import java.util.stream.Stream;



/** Util class that helps iterate over methods throwing {@link IOException}. */

public class IOUtils {



  /**

   * Accepts consumer for each element. First occurred IOException is thrown after all elements are

   * iterated. Other IOExceptions are appended as suppressed.

   *

   * @param iterable list of elements

   * @param consumer that performs accept operation

   * @param <T> type of element

   * @throws IOException first occurred IOException

   */

  public static <T> void forEach(Iterable<T> iterable, IOConsumer<T> consumer) throws IOException {

    IOException firstException = null;

    for (T element : iterable) {

      try {

        consumer.accept(element);

      } catch (IOException e) {

        if (firstException != null) {

          firstException.addSuppressed(e);

        } else {

          firstException = e;

        }

      }

    }

    if (firstException != null) {

      throw firstException;

    }

  }



  public static <T> void forEach(Stream<T> stream, IOConsumer<T> consumer) throws IOException {

    forEach(stream::iterator, consumer);

  }



  /** User defined {@link IOException} throwing consumer. */

  @FunctionalInterface

  public interface IOConsumer<T> {

    void accept(T t) throws IOException;

  }

}